J Thos Rhamstine M-S-A Electrophot Exposure Meter
This Rare J Thos Rhamstine M-S-A Electrophot exposure meter was made in Detroit, Michigan USA and first introduced in 1932, it uses a battery-powered selenium cell as a light receptor. The first photo-electric exposure meter is reported to have been advertised in the Home Movies magazine in October 1931 by J Thomas Rhamstine. There is popular belief that the Weston 617 was the first meter, however, three others are noted before the Weston Meter appeared in August 1932. Before that time photographers had to rely upon their own judgment, or written instructions provided in simple tables to determine the best f-stop and shutter speed combination to use when taking a picture as the existing exposure meters were still very expensive. This hard to find historic photo-meter is in excellent vintage condition, the needle responds to light and the included leather case shows some normal wear. This used M-S-A electrophot exposure meter is sold as a collectible and sold as is.
